Exhaust system monitoring methods and systems

Details Exhaust system monitoring methods and systems Exhaust system monitoring methods and systems

2011-03-08

2011-03-08

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

Having sensor or indicator of malfunction, unsafeness, or...

C060S274000, C060S276000, C060S285000, C123S688000

Reexamination Certificate

active

07900439

ABSTRACT:
A diagnostic system for an exhaust system including a catalyst and a post-catalyst oxygen sensor is provided. The system generally includes a fuel control module that commands fuel to transition from a rich condition to a lean condition and that commands fuel to transition from the lean condition to the rich condition. A first diagnostic module monitors the post-catalyst oxygen sensor during the transition from the rich condition to the lean condition. A second diagnostic module monitors the catalyst during the transition from the lean condition to the rich condition.

REFERENCES:
patent: 4779414 (1988-10-01), Nagai et al.
patent: 5386693 (1995-02-01), Orzel
patent: 5404718 (1995-04-01), Orzel et al.
patent: 5732553 (1998-03-01), Mitsutani
patent: 5845489 (1998-12-01), Dohta et al.
patent: 5851376 (1998-12-01), Nishioka et al.
patent: 6868666 (2005-03-01), Frank et al.
patent: 6874313 (2005-04-01), Yurgil et al.
patent: 6915203 (2005-07-01), Maegawa et al.
patent: 7266942 (2007-09-01), Iihoshi et al.

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